Quick-acting warp stop mechanism for warpers having an oscillatory detector bar



Oct.

' A. QUICK ACTING WARE STOP 1,646,362 E. RHOADES MECHANISM FOR WARPERS HAVING AN OSCILLATORY DETECTOR BAR Filed Feb. 11. 1926 2 Sheets-Shoot '1 JHTPPER LEI/EH" Alonzo E. Rhoodes byWWkM Atty;

A. E. RHOADES QUICK ACTING WARP STOP MECHANISM FOR WARPERS HAVING AN OSCILLATORY DETECTOR BAR Filed Feb. 11. 1926 2 Shets-Sheet 2 I'nV nTo r. Alonzo E. Rhqcdes byMWk AI'rys Patented Oct. 18, 1927.

ALONZO E. RHOADES, OF HOPEDALE,

MASSACHUSETTS, ASSIGNOR T DRAPER COR- POBATION, 0F HOPEDALE, MASSACHUSETTS, A CORPORATION OFMAINE.

QUICK-ACTING WARP STD]? MECHANISM FOR WABPERS'HAVING AN OSCILLATORY DETECTOR BAR. r

. Application filed February 11, 1926. Serial No. 87,644.

This invention relates to improvements in quick-acting warp, stop mechanlsms for warpers having detectormechanism of the type which comprises pivotally mounted nism the principle of which is broadly dis closed in an application for .patent which is filed concurrently herewith, Serial No. 87,643.

The breakage of a warp coming from the creelto the warper may occur near the beam upon which it is to be wound or the warp may break in" front of the stop motion and the trailing end carried on to the beam.

In usual constructions where the stoppage of the warper is delayed after detection of a broken warp many yards of the warp are apt to be carried along before the warper is completely stopped so that in piecing the ends it is almost impossible not to cross them for if the ends are wound around the beam, or the broken end has to be found after it has been wound upon the beam, it is almost impossible to piece up and keep the warps in line. Consequently. frequently the warps are crossed. By the present invention the warper is stopped in a small fraction of the time required for the stoppage of the ordinary warper; consequently. there is much less run-over of the yarn. Furthermore, the prompt stoppage of the warper enables the broken end readily to be found before it has been wound upon the beam, thus saving a crossing of the warps.

One of the objects of the invention is to provice a drop wire construction comprising a pivotally mounted drop wire which is so constructed as to arrest thetransversely oscillating movement of the detector bar in either direction of movement thereof.

Another object of the invention is to provide means for oscillating the drop wire bar from a continually moving vibrator including controlling means operable upon the arrest of the detector bar by a falling drop.

wire to cause the knock off device to effect a stoppage of the warper.

' 'F carried upon an.

A further object of the invention is {to provide. a continually moving actuator having means operable at agreater speed than the speed of movement of the vibrator to actuate the knock-off device when engaged rection of its movement, thereby effecting I,

a prompt stoppage of the warper. p

' Other'objects andfeatures of the invenion will more fully appear from "the. follow ing description and the accompanying draw ings and will be the claims.

Ajpreferred embodiment of the invention is illustrated in the accompanying drawings as applied to the usual type of warper, only such portion of the warper frame being illustrated as is required to show the. application of the invention.

In the drawings: .Fig. 1 is an elevation of oneof the end frames of the warper partially broken away to show the position of thedrop wire mechanism or detector mechanism; i i

Fig. 2 isan enlarged detail rear elevation of a portion of the end frame of the warpershowing the mechanism for transmitting an oscillatory movement to the detector bar shaft and the means for controlling the knock-off device which, when actuated5 effects a stoppage of the warper, the parts particularly pointed out in w being shown in positionto'effect a stoppage I k of the warper; and n Fig; 8-is an enlarged detail view illustrating the action of the drop wire in arresting the oscillatory drop wire bar and its shaft and the relative rotative movement or the clutch members when the drop wire baris arrested.

The warper may be of the usual type comprising end'frames 1 and2 which carrythe usual mechanism of the warper and upon which is mounted the detector mechanism and the means operable thereby for effect ing a stoppage of the warper. A bar'S, extending transversely between the end frames of the warper, is provided with a seat 4 which supports the usual series of blocks '5, in-each of which a plurality of'drop wired 6 is pivotally mounted and [retained separated position A usual r'eetgring bar arm a wtneh'ie'secnred y i to a rock shaft 9. The bar 7 serves the double purpose of arresting the falling drop wires in substantially horizontal position in the path of the vibrating detector and when moved upwardly by the rocking of the shaft 9 to return a released drop wire to position. The ends of usual drop wires are bent upwardly and then reversely bent to provide an eye for a warp. In the present construction the ends of the drop'wires are bent downwardly, that is to say, in the reverse direction. Preferably the free end of the drop wire is first bent abruptly downwardly to presentan outer shoulder 10 and then carried in parallelism with the shank of thedrop wire bar and reversely bent, preferably in substantially the plane of the shank, to provide an eyell and also t present an inner shoulder 12- adapted to engage the detector bar.

The oscillating detector bar .13 is in the form of afiat plate extending transversely of. thewarper and desirably is provided at its upper" end with laterally extending flanges 14 and 15 to insure proper engagementwith the falling drop wire. The detectorbar 13 is carried upon arms 16 ex tending upwardly from and fixedly secured to. a detector bar shaft 17 which is journalled in the end frames of the warper and is so located with respect to the drop wires that a falling drop wire will arrest the detector bar substantially midway of the limits of its oscillatory movement. By virtue of the downwardly bent end of the drop wire to form an eye for the warp, the falling drop wire will either present its outer end as an abutment to arrest the movement of the detector bar in one direction whenthe drop wire falls into engagement with the restoring bar 7 as is illustrated in dotted lines in Fig. 3, or if the detector bar is moving in the opposite direction the shoulder .12 will hook over the upper edge of the detector bar and thereby arrest its movement, as is illustrated in Fig. 3. The flanges 1 1 and 15 at the upper edge of the detector bar will prevent the drop wires from being forced upwardly out of engagement with the detector bar, thereby insuring the prompt stoppage of the movement of said bar.

By reason of the fact that the detector bar is thus arrested during either direction of its movement the stop mechanism of the warper may be more quickly operated than in previous constructions in which the drop wire arrests the detector bar in only one of its directions of movement.

A further object of the invention is to provide. additional means for still more quickly stopping the warper upon the arrest of the detector bar. In the present inven- 7 tion the oscillatory movement is imparted to the detector bar from the usual continually acting vibrator 18 through suitable trans mitting and controlling mechanism which is operable upon the arrest of the oscillating detector bar to cause engagement between a knock-off device and a continuallymoving actuator having means i to. engage and operate the knock-off device at a greater speed than the speed of movement of the vibrator. In the particular construction illustrated a collar 19 is fixedly and prefably adjustably secured to the detector bar shaft by a set screw 20. The collar 19 is" provided with a clutch face having a cam surface preferably in the form of a. reentrant angle presenting symmetrical faces 21' and 22. A complementary movable abutment which may be a collar 26 fixedly secured to the shaft and having an arm 27 connected to and operated by .the clock mechanism of the warper (not shown).

The clutch member 23 is provided with a downwardly extending arm 28 to which is pivotally mounted the bifurcated upper end '29 of a link 30, the lower end of which is connected by a pin and slot connection 31 and 32 to the upperend of the vibrator 18.

In the normal operation of the machine,-

The clutch faces are normally therefore, the vibrator18 oscillates the lower end of the link about the axis of the detector bar shaft 17 and'acting through the clutch members imparts an oscillatory movement to the detector bar 13. of the detector bar by a fallingdrop wire the detector: shaft 1 7 is prevented from. rotation and inasmuch as the clutch member 23 is necessarily oscillated by the movement of the vibrator and connectinglink 30, the movable clutch member 23 will be caused to slide along'the shaft 17 against the resist ance of the spring 25 by the camming action of the complementary cam faces of the clutch 1 member and collar. This sliding movement ofthe movable clutch member is employed to control the actuation of the knock-off mechanism to arrest the warper.

The preferred construction illustrated herein comprises a knock'ofl" device 33 which is pivotally mounted upon a stud 34L upon the end of a horizontal lever 35 which is fulcrumed upon a suitable stud .36 extending from the end frame of the warper. Tlhc' knock-off device has a laterally extending 1 downwardly extending end presenting a Upon arrest 1 shoulder 41 adapted to be engaged by a continually moving actuator having means operable to actuate the knock-off device when engaged thereby at periods of greater frequency than the frequency of movement of the vibrator. V

In the particular construction illustrated the actuator comprises a star wheel 42 which is carried by. a continuarlly rotating shaft 43 driven at such suitable speed that the teeth 44 of the actuator when engaged by the knock-off device will promptly actuate the latter'to cause a stoppage of, the warper. The knock-offdevice is normally held in elevated position by controller mechanism which is operable to permit or cause the knock-off device to engage the; actuator promptly upon arrest of the vibrating detector bar. In the present embodiment of the invention the lever 35. which supports the knock-olf device 33, is provided midway of its length with an arm 45. The end-of this arm is connected by an adjustable link 46 with a looped end 47 of an arm or rod 48 which is seated inthe depending end 49 of onearm 50 of a controlling lever which is pivotally mounted upon astud 51 projecting from a bracket 52 secured to the end frame and the other arm 53 of which lever is provided with a rounded end portion 54, which engages the side 55 of'an enlarged upper portion of the link 30 through which oscillatory movement is transmitted from the vibrator to the detector bar shaft.

In the normal operation of the warper the spring 25 forces the movable clutch member 23 along the detector bar shaft 17 until its clutch face 24 engages the complementary clutch faces 21 and 22 of the collar, thereby locking-the clutch member and collar together so that the shaft 17 1soscillated through the link 30 in synchronism with the movement of the vibrator l8. When a detector bar is arrested by a falling drop wire in either direction of its movement, rotation ofthe detector bar shaft 17 is prevented so that a relative rotary movement, which 1s imparted tot-he movable clutch member 23, causes the clutch member to ride up upon one of the cam faces 21 and 22 of the collar.

This in'turn moves the clutch member 23 44 of the actuator. 'In View" of the relatively rapid movement of these teeth, the knockofl device will be "promptly engaged and actuated to effect a stoppageof the warper.

It will be obvious from the above disclosure that a quick stoppage of the warper is produced by virtue of the fact that the detector bar will be arrested at substantially the limit of its oscillation during either direction of its movement and'that the con trolling mechanism will be promptly operated by the arrested detector bar to cause engagement between the knock-off device and the rapidly moving actuator.

It will be understod that the embodiment of the invention disclosed h-ereinis of an illustrative character and is not restrictive and that various changes in form, construction and arrangement of parts may be made within the spirit and scope of thefollowing claims." I I Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:v

1. Quick-acting warp stop mechanism for warpers comprising a transverse. oscillating, detector bar, a series of pivotally mounted drop wires each having its free end normally supported by a warp and provided at said free end with means operable upon the falling ofthe drop wire to engage and arrest the detectorbar during either direction ofits movement andmeans operable by the arrest of said detector bar to stop the Warper.

2. Quick-acting warp stop mechanism for l warpers comprising an oscillating detector bar, a series of drop wires each pivotally mountedat its lower end and having its upper end providedwith an eye for a warp and presenting an outer and an-inner shoulder operable upon the falling of the drop wire respectively to abutagainst or to hook over the detector bar and thereby arrest it during its movement in either direction and means operable by the arrest of said detector bar to stop the warper. I

3. Quick-acting warp stop mechanism for warpers comprising an oscillating detector bar, a series of drop wires each pivotally mounted atits lower end and bent downwardly and reversely at its upperend to provide an eye for awarp with-a threading slot leading thereto and to present outer and inner shoulders operable upon the falling of the drop wire respectively to abut against or to hook-over the detector bar and thereby arrest it during either direction of its movement and means operable by the arrest of said detector bar to: stop the warper.

4; Quick-acting warp stop mechanism for warpers comprising an oscillating detector bar having flanges extending laterally from theupper-edge thereof, a series of drop wires each pivotally mounted at its lower end and having "at its upper end an eye foria warp and presenting an outer and an inner shoulde'r operable upon the falling of the drop wire respectively to abut against the bar below one flange or to hook over the other flange thereof, means to limit the falling movement of said drop "wires to cause the shouldered outer endthercof to co-operate with said detector bar and means operable by the arrest of said detector bar to stop the warper.

5. Quick-acting warp stop mechanism for warpers comprising an oscillating detector bar, a series of drop wires each pivotally V mounted at its lower end and having its upper end provided with an eye for a warp and presenting an outer and an inner shoulder operable upon the falling of the drop wire respectively to abut or hoolt over ad e tector bar and thereby arrest it duringits movement in either direction, a continually moving vibrator, a knock-off device, controlling mechanism releasably' connected to said detector bar and operable by said vibratorto oscillate said detector'barand means operable by said controlling mechanism when released by the arrest of a detector bar to actuate said knock-off device and thereby efie'ct the stoppageof the warpe'r.

6. Quick-acting warp stop mechanism for \varpers comprising an oscillating detector bar, a series of drop wires each pivotally mounted at its lower end and having its upper end provided with an eye for a warp and presenting an outer and an inner shoul l at der operable upon the falling of the drop wire respectively to abut Jor hook over a detector bar andthereby arrest it during its movement in either direction, a. continually moving vibrator, a. knock-off device, an actuator having means operable at a greater dro wires each having at its free end means "to engage and arrest said detector bar in either direction of its movement, a clutch member fixedly secured to said detector bar shaft and a loose clutch member rotatably and slidably mounted uponsaid shaft, said clutch memberspresenting symmetrical, interengaging cam faces, a; knoclr off device, a continually moving vibrator, means for oscillating saictshaft from said vibrator through said clutch members" means operable by the" sliding movement: of the loose clutch member upon .saidshaft, caused by the action of said cam faces upon arrest of a. detector bar, to actuate said knock-off device and thereby effect astoppage of the warper. r

,8. Quick-acting warp stop mechanism for warp'ers comprising an oscillating detector bar shaft having a detector bar rigidly secured thereto, a series of drop wires each operable when permitted tofall, to arrest said detector bar, acollar: fixedly secured to said detector bar having a. clutch face presenting a cam, a clutch member rotatably and slidab ly mounted upon said detector bar shaft having a clutch face complementary to the face'of said collar, a continually mow ing vibrator, alink pivotally connected at one endto said vibrator and at its other end to said movable clutch member yieldable means acting upon said movable clutch member normally holding the said clutch face in engagement with said collar, whereby oscillatory movement will be impartedto said detector bar shaft from said vibrator, but uponarrest of the detector bar the camming action of said clutch faces will cause the movable clutch member to slide longitudinally of said shaft and a knock-off device operable by the sliding movement of said movable clutch member to eifecta stoppage of the warper. y a

9. Quick-acting Warp stop mechanism for warpei-s comprising an oscillating detector bar shaft having a detector bar rigidly secured thereto, a series 'of drop wires ech' operable when permitted. to fall to arrest said detector'bar, a collar fixedly secured to said detector bar having a clutch face presenting a cam, a clutchmember rotatably and slidably mounted upon said detector bar shaft having a clutch face complementary tothe face of said collar, a continually moving vibrator, a link pivotally connected atone end to said vibratorand at its other end to" said movable clutch member, yieldable means acting upon said movable clutch member normally holding the said clutch faces in engagement with said collar, whereby-0s cillatory movement will: be imparted to said detector bar shaft from saidvibrator, but

upon arrest of the detector bar the camming action of saidclutch faces will cause the movable clutch member to slide longitudinally of saidshaft, a knock-0E device, a continually moving actuator having means operable at a greater speed than the speed of movement of said vibrator to actuate said knock-off when engaged thereby and means operable by the sliding movement of said clutch member upon said detector bar shaft to cause said knock-off device to engage said actuator and thereby effect a stoppage of the warper. y c i 10. Quiclbacting warp atop for warpers comprising an oscillating detector bar shaft having a detector bar rigidly secured thereto, a series of drop wires each operable when permitted to fall to arrest said detector bar, a collar fixedly secured to said detector bar having a clutch face pre senting a cam, a clutch member rotatably and slidably mounted upon said detector bar shaft having a clutch face complementary to the face of said collar, a continually moving vibrator, a link pivotally connected at one end to said vibrator and at its otherend to said movable clutch member, yieidable'means acting upon said movable clutch -member normally holding the said clutch faces in engagement with said collar, whereby oscillatory movement will be imparted to said detector bar shaft from said vibrator, but upon arrest of the detector bar the camming action of said clutch faces will cause the movable clutch member to slide longitudinally of said shaft, a knock-off device, a continually rotating star wheel having arms operable at a greater speed than the speed of movement of said vibrator to actuate said knock-ofif when engaged thereby, a controlling lever having one arm connected to said knock-off lever and another arm engaging the link connecting said vibrator to said movable clutch member operable by the lateral movement of said link caused by the sliding movement of the movable clutch member to permitsaid knock-off device to engage the teeth of said star wheel and there? by effect a stoppage of the warper.

11. Quick-acting warp stop mechanism for nected at its lower end to said vibrator, a

movable clutch member slidably mounted -on said detector bar shaft and having a face complementary to the reJ-entrant clutch face of sald collar, yieldable means engaging said movable clutch member acting .n0r-

mally to hold the complementary clutch faces of said clutch member and collar in engagement, but yielolable in response to the camming action of said clutch faces caused by relativerotary movement of said movable clutch member and collar upon arrest of said detector bar to permit the movableclutch member to slide longitudinally of the. shaft, a knock-01f device, a rotarystar wheel, the arms of which move more rapidly than the speed of movement of said vibrator operable to actuate said knockoff when engaged thereby and means operable by the longitudinally sliding movement of said movable clutch member to cause said knock-off device to engage said actuator and thereby cause prompt stoppage of the warper. 1 V

' V In testimony whereof, I have signed my a name to this specification.

ALONZO E RHOADES. 

